Improvement in heating-drums



F.NJOHNS0N. Heating-Drums.

Patented March l0. 1874.

ATTUBNEY UNITED STATES PATENT OFFICE,

FREDERICK JOENsON, OE ERosTRuRe, MARYLAND.

IMPROVEMENTIN HEATING-DRUMS.

Specification forming part of Letters Patent No. 148,11 63, dated March10, 1874; application filed December 13, 1873.

To all whom it may concern:

Beit known that I, FREDERICK JoHNsoN, of Frostburg, in the county ofAlleghany and State of Maryland, have invented a new and ImprovedAir-Heating Attachment for Stoves, of which the followin g is aspecification:

Figures l and 2 are sectional elevations, showing my heating attachmentapplied to a stove.

The invention is an improvement in the class of heaters formed by a drumvarranged within a iire or furnace chamber, to receive cold air anddischarge it into the apartment in a heated condition.

The invention relates to a drum having a conical form and acorrespondinglyshaped cone iilling its interior, the saine beingarranged in a stove, as hereinafter described.

In the drawing, A indicates the pipe of the cylindrical stove B. It istraversed internally by a pipe, C, which has av mouth, E', openinglaterally. The drum or part C', which forms its terminus within thestove A, is enlarged, as shown, corresponding to the size ofthe latter,but arranged to leave an annular space between them. The drum C' isinclined or tapered at its upper end', below its junction with the pipeC, for the purpose of preventing lodgment of soot, which is anon-conductor, at that point, and also to facilitate the upward passageof air, which enters through the lateral extension E of the drum. Thelower edge of the drum is joined to the corresponding edge of a hollowtruncated cone, D, which is open at the bottoni to admit flame and heatfrom the fire, which will, in practice, be immediately beneath it. Thetop of the cone comes opposite the inclined or conical partof the drum.The object of making the part D conical is to secure a more directimpiugement of the flame and radiated heat on its exposed inner surface,and thus secure a corresponding` result in heating of the air admittedthrough pipe E. The course of the air, and the course of the flame andproducts of combustion, are indicated by feathered and featherlessarrows, respectively, that of the former being through the pipe E,around the cone D, and in contact with all the inner surface of the drumC', thence, through the pipe C, into the apartment at E', while thelatter enter the cone and strike against every part of its innersurface, and also encircle the drum, thus radiating heat into the air inthe drum and in apartment before passing along the flue A. a is av smallair-deflecting plate.

The drum and cone are shown in Fig. 2 as cut away obliquely from thefront side to allow coal or other fuel to be conveniently intro ducedthrough the stove door opposite, to avoid escape of smoke and gasthrough the door on being opened, and to facilitate cleaning of theinterior of the cone.

The cone and drum may be made of castiron, and the pipe C of sheetmetal.

I do not claim a drum having a cavity opening downward into thelire-chamber of a s tove or furnace; but

What I claim is rlhe cone D and inclosing-druxn G ,1nad conical ortapered in its upper part, and having the pipe-connections C and E, incombination with a stove, A', as shown and described.

FREDERICK JOHNSON.

Witnesses SAMUEL JOHNSON, HENRY J oNEs.

